Three squares are placed as shown. Given that the green areas are equal, what is the side length of the orange square?
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New Year 2021
Tag: rectangle
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An Italian hill
Two semicircles inside a rectangle. What is the proportion of the red to the green area?
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Domino day
Three congruent rectangles consisting of two squares each are placed as shown. What is the blue area?
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The ace of diamonds
Four congruent right triangles form a rectangle. What fraction is red?
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The hunting horn
Two semicircles and four tangents. What’s the area of the orange rectangle?
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The rubber rotation
Two overlapping rectangles. What is the proportion of their areas? All triangles in the diagram are right.
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The warning triangle
An equilateral triangle contains three congruent rectangles. Two distances on its base are given. What fraction is white?
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The windshield wipers
A square and two rectangles, connected by two circular arcs, form a square. What is the proportion of the orange to the green area?
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The velocipede
Two circles are embedded in a frame of size 9 x 8. What is their total area?
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The blockhat
Four congruent rectangles are placed in a hat-shaped configuration. What’s the angle between the lines connecting the opposite corners?